Projection lens unit

Details Projection lens unit Projection lens unit

2009-12-23

2011-11-29

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

With support

Reexamination Certificate

active

08068293

ABSTRACT:
A projection lens unit includes: a projection lens having a first optical system for focusing incident image light and also having a second optical system for magnifying and projecting the image light focused by the first optical system; a lens barrel member for accommodating the projection lens and having a small diameter portion in which a joining portion of the first and the second optical system is formed to be the thinnest; a holding member having a first holding face on which the small diameter portion is mounted; and a presser member having a second holding face which holds the small diameter portion together with the first holding face. The holding member is fixed to a housing on which the projection lens unit is mounted. The presser member does not protrude upward from the lens barrel member arranged in a dead space of the small diameter portion.

REFERENCES:
patent: 6195209 (2001-02-01), Kreitzer et al.
patent: 7471464 (2008-12-01), Kageyama
patent: 2007/0024989 (2007-02-01), Kageyama
patent: 2007-25579 (2007-02-01), None
patent: 2007-41157 (2007-02-01), None

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